It’s really not. They’re saying they didn’t do it themselves, but aren’t ruling out it being done by proxy, which is exactly what Valve are saying happened. Actually, it’s a triple weasel, since they also didn’t evaluate any games, they went off unverified 3rd party reports, and aren’t targeting ‘game creator’ sites, but game distribution sites. It could be a potential quadruple weasel, since they could have not ‘required’ any restrictions, but presented such onerous alternatives that it was a de-facto requirement that still fell short of the strictest definition of the word.

And yet there is still porn on Steam, so clearly this is more than just Stripe.